The most delightfully hostile notes ever left on a car windshield.

When you saw the trailer for that movie Flash of Genius where Greg Kinnear plays the guy who invented windshield wipers, you were probably thinking, "If I ever decide to kill myself, it will probably happen while I'm watching a movie about the guy who invented windshield wipers." But as these notes will attest, the windshield wiper is a seriously underrated medium of expression, allowing countless anonymous people to express their furious, amusing, and occasionally psychotic observations to their fellow motorists. All thanks to a little rubber blade against a piece of glass.